1 /*-
2 * Copyright (c) 2002 David E. O'Brien. All rights reserved.
3 * Copyright (c) 1990, 1993
4 * The Regents of the University of California. All rights reserved.
5 * (c) UNIX System Laboratories, Inc.
6 * All or some portions of this file are derived from material licensed
7 * to the University of California by American Telephone and Telegraph
8 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
9 * the permission of UNIX System Laboratories, Inc.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)varargs.h 8.2 (Berkeley) 3/22/94
36 * $FreeBSD: src/sys/i386/include/varargs.h,v 1.13 2004/04/07 20:46:05 imp Exp $
37 */
38
39 #ifndef _MACHINE_VARARGS_H_
40 #define _MACHINE_VARARGS_H_
41
42 #if defined(__GNUC__) && (__GNUC__ == 2 && __GNUC_MINOR__ > 95 || __GNUC__ >= 3)
43
44 #include <sys/_types.h>
45
46 #ifndef _VA_LIST_DECLARED
47 #define _VA_LIST_DECLARED
48 typedef __va_list va_list;
49 #endif
50
51 typedef int __builtin_va_alist_t __attribute__((__mode__(__word__)));
52
53 #define va_alist __builtin_va_alist
54 #define va_dcl __builtin_va_alist_t __builtin_va_alist; ...
55 #define va_start(ap) __builtin_varargs_start(ap)
56 #define va_arg(ap, type) __builtin_va_arg((ap), type)
57 #define va_end(ap) __builtin_va_end(ap)
58
59 #else /* ! __GNUC__ post GCC 2.95 */
60
61 typedef char *va_list;
62
63 #define __va_size(type) \
64 (((sizeof(type) + sizeof(int) - 1) / sizeof(int)) * sizeof(int))
65
66 #ifdef __GNUC__
67 #define va_alist __builtin_va_alist
68 #endif
69 #if __GNUC__ > 1
70 #define va_dcl int va_alist; ...
71 #else
72 #define va_dcl int va_alist;
73 #endif
74
75 #define va_start(ap) \
76 ((ap) = (va_list)&va_alist)
77
78 #define va_arg(ap, type) \
79 (*(type *)((ap) += __va_size(type), (ap) - __va_size(type)))
80
81 #define va_end(ap)
82
83 #endif /* __GNUC__ post GCC 2.95 */
84
85 #endif /* !_MACHINE_VARARGS_H_ */
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